﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace 控制台应用
{
    public class StringHelper
    {
        public string str { get; set; }

        public void getBeforeOneByte(string str)
        {
            str = str.Substring(0, 1);
        }
    }
}
